They are known by many names: Iga-mono, Kunoichi, Nokizaru, Nonomi, Rappa, Shinobi, and in the west we call them them Ninja; but in the Lands of the Jade Oath they are known as Kusa.

Kusa are covert agents or mercenaries specializing in the unorthodox arts of war. The functions of the kusa include espionage, sabotage, infiltration, and assassination, as well as open combat in certain situations.